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Small rectangular blue battery with two terminals, 49.8 by 28.5 by 15.5 millimetres

Cameron Sino Siren Alarm Battery 640mAh 5.12Wh 8.0V Volvo 31450445 P0839A

SKU CH-Z733-NYA2G

Replacement siren alarm battery for Volvo C40, S60, S90, V60 and XC90 models, 640 mAh 8.0 V with ISO9001, RoHS and CE certification

  • Replaces Volvo siren alarm battery across C40 S60 S90 V60 XC90 models
  • 640 mAh 5.12 Wh 8.0 V capacity matches original specification
  • ISO 9001 RoHS CE certified for safety and compliance
  • 80 x 28.50 x 15.50 mm size fits factory housing exactly
  • Built-in protection against overcharge over-discharge over-voltage and short circuit

Siren Alarm Battery for Volvo Models

This 640mAh 5.12Wh 8.0V replacement battery fits Volvo C40, S60, S60 MK3, S90, V60 and XC90 models from 2018 to 2021. It is built for owners who need a direct substitute for the original siren alarm power source.

Compact Build with Protective Features

The unit measures 49.80 by 28.50 by 15.50mm and weighs 42.0g, matching the original dimensions for a secure fit. A fully decoded chip works like the factory part while overcharge, over-discharge, over-voltage and short-circuit protection guard the cell during daily operation.

Direct Replacement for Part Numbers 31450445

It replaces the OE siren alarm battery when the original no longer holds charge or triggers low-voltage warnings. The jump is worth it when the vehicle's alarm system shows reduced reliability or the battery has reached the end of its service life. Not for buyers who need a high-capacity pack for accessories or a different voltage platform.

How it compares

Measured against everything we stock in Batteries, Cords & Power Parts, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 64% of the 100 comparable items (median $17.99).

Specifications

Product
Brand nameCameron sino

Questions about this item

What voltage does the 8.0 V siren alarm battery deliver to the vehicle system?

The battery supplies a nominal 8.0 V to the siren alarm circuit, matching the original Volvo 31450445 specification.

Will the 49.80 x 28.50 x 15.50 mm case fit the factory siren bracket on a 2018 XC90 T8?

Yes, the dimensions match the OEM housing so the battery slides into the existing bracket without modification.

What is the correct polarity orientation when inserting the replacement cell into the siren module?

Align the positive and negative terminals exactly as the original P0839A cell; reversing them triggers the protection circuit and prevents operation.

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